HESI RADIOLOGY EXIT EXAM PRACTICE (VERSION
1) LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
1.
Which imaging modality uses ionizing radiation?
A. MRI
B. Ultrasound
C. CT scan
D. PET scan
Answer: C. CT scan
Rationale: CT scans use X-rays, which are a form of ionizing radiation.
2.
Which structure is best evaluated using MRI?
A. Bone fractures
B. Soft tissue and brain
C. Lung fields
D. Gallstones
Answer: B. Soft tissue and brain
Rationale: MRI provides superior contrast resolution for soft tissues.
3.
What is the primary safety concern with MRI?
A. Radiation exposure
,B. Heat injury
C. Magnetic field interference
D. Contrast allergy
Answer: C. Magnetic field interference
Rationale: MRI uses strong magnets that can affect implanted metal devices.
4.
Which contrast agent is commonly used in CT imaging?
A. Barium sulfate
B. Iodine-based contrast
C. Gadolinium
D. Air
Answer: B. Iodine-based contrast
Rationale: Iodinated contrast enhances vascular and organ structures on CT.
5.
A contraindication for MRI is:
A. Fever
B. Pacemaker
C. Hypertension
D. Diabetes
Answer: B. Pacemaker
Rationale: Pacemakers may malfunction in MRI magnetic fields.
6.
Which imaging modality is best for gallbladder stones?
A. X-ray
B. Ultrasound
,C. MRI
D. PET
Answer: B. Ultrasound
Rationale: Ultrasound is highly effective for detecting gallstones.
7.
What does a PET scan primarily evaluate?
A. Bone density
B. Metabolic activity
C. Soft tissue anatomy
D. Air flow in lungs
Answer: B. Metabolic activity
Rationale: PET scans measure glucose metabolism in tissues.
8.
Which is the safest imaging modality in pregnancy?
A. CT scan
B. X-ray
C. MRI without contrast
D. PET scan
Answer: C. MRI without contrast
Rationale: MRI avoids ionizing radiation, making it safer in pregnancy.
9.
What is the primary purpose of a chest X-ray?
A. Evaluate liver disease
B. Assess lung and heart structures
, C. Detect brain tumors
D. Evaluate bones of the spine only
Answer: B. Assess lung and heart structures
Rationale: Chest X-rays are commonly used for cardiopulmonary evaluation.
10.
Which radiation type has the highest penetration power?
A. Alpha
B. Beta
C. Gamma
D. Infrared
Answer: C. Gamma
Rationale: Gamma rays have the greatest penetration ability.
11.
What should be assessed before administering iodinated contrast?
A. Hearing ability
B. Allergy history
C. Vision test
D. Blood type
Answer: B. Allergy history
Rationale: Iodine contrast can cause allergic reactions.
12.
Which organ is best visualized with ultrasound?
A. Brain
B. Bones
1) LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
1.
Which imaging modality uses ionizing radiation?
A. MRI
B. Ultrasound
C. CT scan
D. PET scan
Answer: C. CT scan
Rationale: CT scans use X-rays, which are a form of ionizing radiation.
2.
Which structure is best evaluated using MRI?
A. Bone fractures
B. Soft tissue and brain
C. Lung fields
D. Gallstones
Answer: B. Soft tissue and brain
Rationale: MRI provides superior contrast resolution for soft tissues.
3.
What is the primary safety concern with MRI?
A. Radiation exposure
,B. Heat injury
C. Magnetic field interference
D. Contrast allergy
Answer: C. Magnetic field interference
Rationale: MRI uses strong magnets that can affect implanted metal devices.
4.
Which contrast agent is commonly used in CT imaging?
A. Barium sulfate
B. Iodine-based contrast
C. Gadolinium
D. Air
Answer: B. Iodine-based contrast
Rationale: Iodinated contrast enhances vascular and organ structures on CT.
5.
A contraindication for MRI is:
A. Fever
B. Pacemaker
C. Hypertension
D. Diabetes
Answer: B. Pacemaker
Rationale: Pacemakers may malfunction in MRI magnetic fields.
6.
Which imaging modality is best for gallbladder stones?
A. X-ray
B. Ultrasound
,C. MRI
D. PET
Answer: B. Ultrasound
Rationale: Ultrasound is highly effective for detecting gallstones.
7.
What does a PET scan primarily evaluate?
A. Bone density
B. Metabolic activity
C. Soft tissue anatomy
D. Air flow in lungs
Answer: B. Metabolic activity
Rationale: PET scans measure glucose metabolism in tissues.
8.
Which is the safest imaging modality in pregnancy?
A. CT scan
B. X-ray
C. MRI without contrast
D. PET scan
Answer: C. MRI without contrast
Rationale: MRI avoids ionizing radiation, making it safer in pregnancy.
9.
What is the primary purpose of a chest X-ray?
A. Evaluate liver disease
B. Assess lung and heart structures
, C. Detect brain tumors
D. Evaluate bones of the spine only
Answer: B. Assess lung and heart structures
Rationale: Chest X-rays are commonly used for cardiopulmonary evaluation.
10.
Which radiation type has the highest penetration power?
A. Alpha
B. Beta
C. Gamma
D. Infrared
Answer: C. Gamma
Rationale: Gamma rays have the greatest penetration ability.
11.
What should be assessed before administering iodinated contrast?
A. Hearing ability
B. Allergy history
C. Vision test
D. Blood type
Answer: B. Allergy history
Rationale: Iodine contrast can cause allergic reactions.
12.
Which organ is best visualized with ultrasound?
A. Brain
B. Bones
